| 摘要 |
PURPOSE:To reduce a rotation converting mechanism and reduce the cost thereof and to achieve high performance in a combination of a circular arc tooth inner gear such as a pin and a trochoid outer gear, by transmitting driving force to the outer gear through an eccentric member disposed on a driving shaft. CONSTITUTION:An output shaft 1 of a fluid-pressure motor M is spline-coupled to an eccentric body shaft 6, and the eccentric body shaft 6 is integral with two eccentric bodies 6A, 6B, the phases of which are shifted in a 180-degree arc. Outer gears 11A, 11B having a trochoid tooth 12 are fitted to respective eccentric bodies 6A, 6B through bearings 8A, 8B. A rotary casing-inner gear 19 is provided with a lot of outer pins 20 formed on the inner peripheral surface thereof, thereby to form a circular inner gear. If the outer gears 11A, 11B are once revolved round the shaft by one rotation of the eccentric body shaft 6, and there is a difference in the number of teeth by one between the outer gears 11A, 11B and the inner gear 19, the inner gear 19 is rotated by one tooth form. |
